The U.S. Department of Justice has filed a lawsuit to keep a Tinton Falls-based drug compounding business closed three months after mold was discovered in five intravenous bags it had prepared for a hospital. The complaint against Med Prep Consulting and its owner, Gerald Tighe, cited numerous health violations, drug misbranding and years of repeated failures to comply with warnings as evidence of wrongdoing. The lawsuit, on behalf of the Food and Drug Administration, was filed Friday in federal court in Trenton.